Jamb structure for coke oven batteries



Oct. 26, 1965 w. BEIMANN JAMB STRUCTURE FOR COKE OVEN BATTERIES Filed Sept. 27, 1962 1+ Fol By I M WTOR NE Y United States Patent 3,214,353 JAMB STRUCTURE FGR @QKE OVEN BATTEREES William llieimann, Manhasset, N.Y., assignor to Allied Chemical orporation, New York, N.Y., a corporation of New York Filed Sept. 27, 1962, Ser. No. 226,500 6 Claims. (Cl. 202-248) This invention relates to coke oven batteries constituted of alternate crosswise extending vertical flued heating walls and coking chambers, with the heating walls flanking the sides of the coking chambers and held under compressive forces by buckstays positioned at the ends of each heating wall and bearing thereagainst. More particularly, this invention relates to the construction of the ends of the heating walls, i.e., the jamb structure of such batteries.

In coke oven batteries the end jamb brick, i.e., the brick defining the extreme ends of the coking chambers (the openings at the pusher end and coke discharge end of the coking chambers) are the portions of the heating walls which require occasional replacements. These end jamb brick are exposed to the atmosphere each time the coking chamber doors are removed and invariably spall and crack under conditions of operation involving periodic pushing of the coke charge. As heretofore con structed the jamb brick could not be removed and replaced without affecting the compressive forces exerted by the conventional buckstays on the ends of the heating walls and without disrupting and exposing to the atmosphere the end flues of the heating wall, the outer wall of which was defined at least in part by the jamb brick.

It has been proposed to build oven walls of high temperature resistant silica brick and the end jamb brick of fireclay which are more resistant to spalling when exposed to atmospheric air (United States Patent 1,430,027 granted September 26, 1922). Since silica brick and fireclay brick have different coefiicients of expansion, such design upon heating up of the battery, results in differential expansion between the silica and fireclay brick resulting in the formation of objectionable cracks and openings in the jamb structure of the heating walls.

It is an object of the present invention to provide a jamb structure which permits ready replacement of the end jamb bricks without taking off the compressive forces exerted by the bnckstays on the ends of the heating walls.

Another object of this invention is to provide such jamb structure in which the end jamb brick can be replaced without exposing any of the heating flues to the atmosphere and without removing the compressive forces exerted by the buckstays on the ends of the heating walls.

Still another object of this invention is to provide such jamb structure for the ends of the heating walls of a coke oven battery in which the end jamb brick are of fireclay and hence more resistant to spalling upon exposure to the atmosphere and the intermediate jamb brick and the remaining brick of the heating wall are of silica and yet excessive spaces and cracks do not form in the jamb structure during the normal operation of the battery due to differential expansion of the fireclay and silica brick portions of the heating wall.

Other objects and advantages of this invention will be apparent from the following detailed description thereof.

In accordance with this invention a jamb structure is provided for the ends of the heating walls maintained under compressive forces exerted by the buckstays at the opposite ends of each heating wall, which jamb structure is constituted of courses of brick, each course consisting of (1) two spaced end jamb bricks, the outer side of each of which define a portion of a coking chamber, (2) a center jamb brick having an inner portion filling the space between the inner sides of the two spaced end jamb bricks and an outer portion defining a surface receiving compressive force from the buckstay positioned adjacent the end of the heating wall, and (3) a lateral end brick positioned contiguous to the inner ends of the two end jamb bricks and the inner portion of the center jamb brick extending across the space between the two end jamb bricks, which lateral end brick defines a portion, i.e., the outer portion of the outer end wall of the end flue in the heating wall. The heating wall has oppositely disposed stretcher brick, a header brick and tiller brick in each course, which with the lateral end brick define the portion of the walls of the end flue in the heating wall formed by the course; the lateral end brick of each course not only bridges the space between the two end jamb bricks but also bridges the space between the stretcher brick defining the opposite sides of the heating wall.

The usual metal door frame is held in place, desirably by clamps having one end secured to the buckstays and the other end bearing on the door frame. Normally the buckstay pressure is applied to the center jamb brick of each course and via the door frame and end jamb bricks to the oven walls. When replacing the end jamb bricks, the buckstay pressure is maintained on the center jamb bricks and lateral end bricks and through the latter on the oven walls. The door frame is removed by loosening the ends of the clamps holding the door frame in place before replacing the end jamb bricks. The jamb structure of this invention permits removal of the door frame and the end jamb bricks while retaining the buckstay pressure through the center jamb bricks and lateral end bricks on the oven walls.

The bricks defining the jamb of alternate courses in each wall are of the same shape and dimensions but are differently dimensioned from the corresponding bricks in the adjacent courses. Hence the joints between contiguous bricks in the jamb structure of one course along the height of the wall are staggered relative to the corresponding joints between the contiguous bricks in the adjacent courses. The end heating flue in each heating wall is thus defined by the lateral end brick, the cooperating stretcher, header and filler bricks. The two spaced end jamb bricks of each course in each heating wall while forming tight joints with the lateral end brick, the ends of the stretcher brick and with the center jamb brick, are replaceable. When the coke oven door frame is removed, the buckstay pressure or compressive force is exerted on the outer face of the center jamb brick, the lateral end brick and through the latter on the oven walls and not on the spaced end jamb brick. Hence the two spaced end jamb bricks of each course can be replaced without removing the compressive forces exerted by the buckstays on the ends of the heating walls. Also, with the structure of this invention, such replacements can be effected without disrupting the brick walls defining the end fiues.

Preferably, but not necessarily, the end jamb bricks of each course are fireclay bricks :and the center jamb brick and lateral end brick as well as the bricks forming the rest of the heating wall are silica bricks. While such construction represents a preferred embodiment, this invention is not limited thereto but includes heating walls of all silica bricks. When building the beating walls with the end j'amb bricks of fireclay bricks, these end jamb fireclay bricks, if desired, are not put in place until the battery has been heated up to operating temperatures. Alternatively, the end jamb bricks of fireclay can be put in place and by adjusting the clamps holding the door frames in place so that there is little friction between the door frame and the end clay jamb bricks, each course of silica Wall bricks on expansion, due to the interlocking character of the jamb structure involving the staggered joints between bricks of successive courses, will effect movement of the clay jamb bricks in the course, so that the clay jamb bricks in all courses are moved substantially the same extent without formation of ob ectionable cracks. I

An important feature of this invention, as will be pointed out more fully hereinafter, is that the amb structure is so constructed and designed that the buckstays at the ends of the heating walls exert compressive forces on the center jamb brick and through the latter on the lateral end bricks and thence to the oven walls, when the door frames are no longer held in clamped position by the clamps on the buckstays, permitting replacement and re moval of the end jamb bricks without taking off the buckstay compressive forces or pressures exerted on the opposite ends of the heating walls through the aforesaid center jamb bricks and lateral end bricks. This feature not only permits ready replacement of the end amb bricks when necessary but also permits placement of the end jamb fireclay bricks, when such fireclay bricks are used, to complete the l eating walls after the battery has been heated up to operating temperatures.

The fireclay end jamb bricks are dimensioned for :any given battery in which they are employed to take into account the size and shape of the continuous brick and expansion, which for fireclay is relatively small, which takes place upon heating up the battery to operating temperatures. The fireclay brick are held in place by the usual mortar. In the completed wall, when it reaches operating temperatures, the end jamb fireclay bricks of each course are firmly bonded to the center amb brick, the lateral end brick and the stretchers or liner brick at the ends of the heating wall. Objectionable spaces and cracks do not form in the jamb structure. Whenthe end jamb fireclay brick are put in place after the silica brick of the heating wall have reached their limit of expansion, the fireclay bricks and silica bricks forming the jamb structure are not subjected to differential expansion during the heating up of the battery. When put in place, before heating up, the interlocking jamb structure here in described causes movement of the end jamb bricks of all courses to the same extent so that objectionable spaces and cracks do not form in the jamb structure.

The embodiment of the invention shown on the drawing involves a coke oven battery having in each course, end jamb bricks of fireclay and a center jamb brick of silica with the fireclay jamb bricks put in place in each heating wall either after the battery has been heated up to operating temperatures or as the heating wall 18 built with the end jamb bricks in place before starting the heating up of the battery.

The jamb structure, however, as noted, can be of all silica bricks and the shape and dimensions of the bricks can be altered from that shown without departing from the scope or spirit of the present invention. Hence it is apparent that the present invention is not confined to the present illustrated embodiment of the invention shown in the drawings, in which:

FIGURE 1 is a fragmentary elevation of an end of a heating wall showing the staggered arrangement of the joints between the brick in adjacent courses;

FIGURE 2 is a fragmentary horizontal view showing the arrangement of brick in the even numbered courses; this figure is a horizontal plan taken in the plane indicated by line 22 on FIGURE 1;

FIGURE 3 is a similar fragmentary view showing the arrangement of brick in the odd numbered courses; this figure is a horizontal plan taken in the plane indicated by line 3-3 on FIGURE 1; and

FIGURE 4 is a fragmentary vertical section through a heating wall taken in a vertical plane passing through lines 4-4 on FIGURE 2.

The drawing shows a coke oven battery which has conventional alternate crosswise extending coking chambers 10 above the regenerators (not shown) and heating walls 511 flanking the sides of the coking chambers 10. Each heating wall 11 is formed with side-by-side vertical lines 12 which can be any known type vertical flue, e.g., twin or hairpin fiues, fiues arranged in interconnected groups in each heating wall, or with one or more fines of each heating wall connected over the top of a coking chamber with one or more flues in an adjacent heating wall. At the opposite ends of each heating Wall one or more buckstays .13 are positioned, each extending the full height of the battery. In the embodiment shown in the drawings one such buckstay is shown but it will be understood that a pair of such buckstays can be used instead of a single buckstay at the end of each heating wall. As conventional, these buckstays have tie rods (not shown) at their :upper ends which extend through or above the roof of the battery above each heating wall so that the buckstays at the opposite ends of each heating wall exert cornpressive forces or pressure on the heating wall towards the longitudinal median. The base of each buckstay is provided with an anchor bolt equipped with a heavy spring to exert compressive forces or pressure on the lower ends of the buckstays toward the longitudinal median of the battery. In this way the ends of the heating walls and the regenerator walls therebeneath are maintained under compressive forces which tend to close up cracks or fissures which might form in the refractory brickwork and keep the refractory brickwork of the battery tight.

Also, as conventional, a metallic door frame 15 surrounds each coking chamber opening. As shown in FIG- URES 2 and 3 of the drawing, the sides of one type of such door frame are shown comprising flange 16 and door sealing surface 17 against which bears the sealing edge 18 of a self-sealing door 19, fragmentarily shown in the drawing. As conventional, each door frame 15 is held in place by suitable clamps 21 which are bolted or otherwise suitably fastened to an adjacent buckstay 13. Suitable luting 22 and high temperature resistant insulating material is disposed between the door frame and the jamb structure 25. As the portions of the coke oven battery thus far described are well known and the structure thereof shown in the drawing represents one suitable embodiment of door frame and door closure, to which, however, the invention is not limited, it is believed further description of these portions of the battery is unnecessary.

In accordance with this invention the jamb structure 25 for each end of each heating wall comprises alternate courses of brick. The brick in the even numbered courses are shown in FIGURE 2. Each even numbered course comprises two like end jamb brick 26 and 27 spaced apart and having therebetween a center jamb brick 28. For convenience in describing the jamb brick, which it will be noted can be considered as a brick having four sides, the two sides of the jamb brick in position in the heating wall parallel to the coking chamber will be referred to as the inner and outer sides, respectively, the outer side being the side which defines a portion of the Wall of the coking chamber, and the other two will be referred to as the inner and outer ends. Each end jamb brick 26 and 27 has an outer end 29 provided with corner recesses 31. Each end jamb brick has at its inner end a cutaway portion 32 extending from the inner side of the end jamb brick along its inner end in a direction toward and terminating short of the outer side as shown in FIG- URE 2.

The center jamb brick of each of the even numbered courses is shaped as shown in FIGURE 2 to make a tight fit with the contiguous inner corner recess and inner side of the end jamb brick. In the embodiment shown in the drawings, center jamb brick 28 are substantially T- shaped and their outer portions 33 provide a bearing surface against which the compressive forces of the buckstay 13 are exerted. In the embodiment shown in the drawings a suitable metal armor plate 34 encloses the outer portion of center jamb brick 28; armor plate 34 is positioned between the outer portion of the center jamb brick 28 and the adjacent flange of the buckstay 13 so that the buckstay pressure is exerted on the center jamb brick through the armor plate 34.

A lateral end brick 35 of oblong shape, as shown in FIGURE 2, is dimensioned so that the opposite corners thereof make a tight joint with the cutaway portions 32 in the end jamb brick 26 and 27. The lateral end brick 35 in all of the even numbered courses are identical and with the lateral end brick in the odd numbered courses and the cooperating stretcher or liner brick 36, 37 define the outer wall of the end flue of the heating wall. Thus the outer wall of the end flue of a heating wall remains intact should one or both end jamb brick 26 and 27 be removed, the outer wall of the end flue being defined by the lateral end brick and the stretcher or liner brick of the heating wall.

Each lateral end brick 35 has a groove 38 in its top surface for reception of a congruent tongue 39 on the underside of an overlying brick. Thus each lateral end brick has a tongue 39 on its underside and a groove 38 in its top surface for receiving the tongue 3? of an overlying brick.

The end jamb brick 41 and 4-2 of the odd numbered courses shown in FIGURE 3 are the same in shape but differ in shape from the end jamb brick 26, 27 of adjacent courses. As shown in FIGURE 3 each end jamb brick 41, 42 has an outer end 43 contiguous to which is a recess 44 located in the outer corner of the brick common to the outer end and the outer side, and a second deeper recess 45 on the inner corner common to the outer end and the inner side. Inner end 46 is of stepped configuration and has a recess 47 in the inner corner common to the inner side and inner end, and a projection 43 at the outer corner common to the outer side and inner end. Each end jamb brick 41, 42 has an inner side 47 respectively.

All of the center jamb brick 43 in the odd numbered courses are the same in shape and are shaped as shown in FIGURE 3 to make tight joints with the end jamb brick 41 and 42. As shown in FIGURE 3, the center jamb brick 49 has projections 50 on the side walls there of congruent with recesses 45 on the end jamb brick 41 and 42 and the side walls of the center jamb brick are congruent with the inner sides 59, 4'7 on the end jamb bricks 41, 42. The outer surface of each brick 49 is armored with suitable metallic armor the same or similar to armor plate 34 enclosing the outer surface of center jamb brick 28. As noted, buckstay 13 bears against this armor. The outer portions of the center jamb brick of both the even and odd numbered courses lie in the same vertical plane, i.e., are aligned vertically. Notwithstanding the difference in the shape of the center jamb brick and the end jamb bricks in adjacent courses, the outer portions of the center jamb brick and outer ends of the end jamb brick defining the outer end of the jamb struc ture are proportioned so that corresponding portions of the ends of the jamb structure in all courses are in alignment vertically.

Oblong lateral end brick 52 is dimensioned so that the opposite corners thereof make a tight joint with the recesses 47 in the end jamb brick 41 and 42. Brick 52 in all odd numbered courses are identical and are smaller than, although of the same general shape as, the lateral end brick 35 in the even numbered courses. As in the even numbered courses, each lateral end brick 52 in the odd numbered courses is bonded to the stretcher or liner brick 36, 37 and with these liner brick and the lateral Cit end brick and liner brick in the even numbered courses define the outer wall of the end flue of the heating wall so that this wall remains intact independently of the end jamb brick.

Each lateral end brick 52 has a groove 38 in its top surface for reception of a congruent tongue on the underside of an overlying brick in the same course.

The liner brick 36 and 37 are formed with grooves 54 in their top surfaces for reception of tongues on the base of the overlying liner brick. The wall defining the inn-er end of the last flue is formed, as customary, by filler brick 55 and header brick 56. Viewing FIGURES 2 and 3, in the even numbered courses, the header brick 56 is positioned on one side and in the odd numbered courses on the opposite side of each heating wall. Each header brick has a rectangular projection 57 on its base surface and each filler brick a like projection positioned to be received by the congruent recesses 58 in the filler brick of an underlying course. The liner brick have their ends shaped to form tight joints with the ends of the respective bricks in abutment as shown in FIGURES 2 and 3.

With this construction and shape of brick, it will be evident that the joints J1 between the lateral end brick and the end jamb, and between the lateral end brick and the liner brick, in the even numbered courses are staggered with respect to the corresponding joints J2 in the odd numbered courses. This makes for a tight joint construction.

Employing fireclay jamb bricks 26, 2.7, 4-1 and 42, the battery brickwork is built up with or without these jamb bricks, as explained above. These fireclay end bricks, as noted, can be put into place after the battery has been heated up to operating temperatures, because the end titles in each heating wall are completely enclosed and the ends of the heating walls are maintained under compressive forces or pressures exerted by the buckstays bearing against the bearing surfaces of the center jamb brick 23 and 49. When the fireclay end jamb bricks are thus put in place after heating up of the battery, differential expansion does not take place because the silica brick has already reached its maximum expansion and will not expand further. When put in place before heating up of the battery, the interlocking structure of the silica bricks and the end jamb bricks, on expansion of the silica bricks effects movement of the contiguous clay jamb bricks without objectionable crack formation in the jamb structure.

When it is necessary to effect repair to the coking chamber openings, which, it will be noted, are defined by the end jamb bricks 26, 27, 41 and 42, it is a relatively simple matter to pry out the damaged end jamb bricks and replace them. Removal of these bricks does not open up the end fines, which remain enclosed by the lateral end bricks, the liner bricks and cooperating filler and header bricks. Nor does such removal materially afiect the buckstay pressure on the ends of the heating wall; it will be noted from FIGURES 2 and 3 that with the construction of this invention, when the door frame 15 is removed, the buckstay pressure is applied to the outer ends of the center jamb bricks 28 and 49 and not to the end jamb bricks 26, 27, 41 and 42; from the center jamb bricks the pressure is applied to the lateral end bricks and thence to the opposite sides of each heating wall. The heating walls are thus maintained under compressive forces from the opposite ends thereof (sides of the battery) toward the longitudinal median of the battery.

It is to be understood that this invention is not to be restricted to the present disclosure including the showing of the drawings, except as defined by the appended claims.

What is claimed is:

1. In a coke oven battery having vertically flued heating walls of refractory brick flanking the sides of the coking chambers and buckstays positioned adjacent the opposite ends of the heating walls and exerting compressive forces against the ends of the heating walls on opposite sides of the battery, a jamb structure forming the end of each heating wall constituted of courses of brick with each course consisting of (1) two spaced end jamb bricks, the outer sides of each of which defines a portion of a coking chamber opening, (2) a center jamb brick having an inner portion filling the space between the inner sides of said two spaced end jamb bricks and an outer portion defining a surface receiving compressive forces from the buckstay positioned adjacent the end of said heating wall, said outer portion being spaced outwardly away from the outer ends of said end jamb bricks, and (3) a lateral end brick positioned contiguous to the inner ends of said two end jamb bricks and said inner portion of said center jamb brick, extending thereacross and defining a portion of the outer end wall of the end flue in said heating wall, said heating wall having courses of brick, with one course for each course of brick in said jamb structure, each of the heating wall courses consisting of oppositely disposed stretcher bricks, header bricks and filler bricks with one header brick and a filler brick at the opposite ends of each pair of stretcher bricks except at each of the ends of the heating wall where a lateral end brick, a pair of oppositely disposed stretcher bricks, a header brick and a filler brick define the portions of the walls of the end flue formed by said course, the said bricks defining the jamb of alternate courses being of the same shape and dimensions and being differently dimensioned from the corresponding bricks in adjacent courses whereby the joints between contiguous bricks in one course are staggered relative to the corresponding joints between contiguous bricks in adjacent courses, the buckstays at the opposite ends of each heating wall being positioned directly opposite the outer portions of the center jamb bricks of all courses in said heating wall to apply compressive forces to said outer portions of said center jamb bricks, a door frame for each coking chamber opening positioned with the vertical surfaces thereof directly in front of the end jamb bricks forming the ends of the heating walls flanking said coking chamber, clamping means extending from each buckstay to the vertical side of the door frame adjacent thereto to hold said door frame in place, said buckstay applying compressive forces to the end jamb brick adjacent said buckstay through said clamping means and the portion of the door frame positioned directly in front of said end jamb bricks.

2. In a coke oven battery having vertically flued heating walls of refractory brick flanking the sides of the coking chambers, and buckstays bearing against the opposite ends of each heating wall, a jamb structure for each end of each heating wall constituted of courses of bricks with each course consisting of (1) two spaced end jamb bricks, the outer side of each of which defines a portion of a coking chamber opening, (2) a center jamb brick having an inner portion between and contiguous to the inner sides of said two end jamb bricks, filling the space therebetween and an outer portion defining a bearing surface for the buckstay positioned adjacent the end of said heating wall, said outer portion being spaced outwardly away from the outer ends of said end jamb bricks, and (3) a lateral end brick positioned contiguous to the inner ends of said two spaced end jamb bricks and said inner portion of said center jamb brick, said lateral end brick bridging the space between said two spaced end jamb bricks and defining a portion of the end wall of an end flue in said heating wall; the bricks of one course being individual to that course, and the joints between said bricks of each course being staggered relative to the corresponding joints between said bricks in an adjacent course along the height of said heating wall; the buckstays at the opposite ends of each heating wall being positioned directly opposite the outer portions of the center jamb bricks of all courses in said heating wall to apply compressive forces to said outer portions of said center jamb bricks; a door frame for each coking chamber opening positioned with the vertical surface thereof directly in front of the end jamb bricks forming the ends of the heating walls flanking said coking chamber; and clamping means extending from each buckstay to the vertical side of the door frame adjacent thereto to hold said door frame in place, said buckstay applying compressive forces to the end jamb bricks adjacent said buckstay through said clamping means and the portion of the door frame positioned directly in front of said end jamb bricks.

3. In a coke oven battery having vertically flued heating walls of refractory brick flanking the sides of each coking chamber and buckstays bearing against the opposite ends of each heating wall, a jamb structure defining an end of each heating wall constituted of courses of bricks with each course consisting of (1) two spaced end jamb bricks, the outer side of each of which defines a portion of a coking chamber opening, (2) a center jamb brick having an inner portion fillling the space between the inner sides of said two spaced jamb bricks and an outer portion defining a bearing surface for the buckstay positioned adjacent the end of said heating wall, said outer portion being spaced outwardly away from the outer ends of said end jamb bricks, and (3) a lateral end brick positioned contiguous to the inner ends of said two end jamb bricks and said inner portion of said center jamb brick, extending thereacross and defining a portion of the outer end wall of the end flue in said heating wall, the bricks of one course being individual to that course, the buckstays at the opposite ends of each heating wall being positioned directly opposite the outer portions of the center jamb bricks of all courses in said heating wall to apply compressive forces to said outer portions of said center jamb bricks, a door frame for each coking chamber opening positioned with the vertical surfaces thereof directly in front of the end jamb bricks forming the ends of the heating walls flanking said coking chamber, and clamping means extending from each buckstay to the vertical side of the door frame adjacent thereto to hold said door frame in place, said buckstay applying compressive forces to the end jamb bricks adjacent said buckstay through said clamping means and the portion of the door frame postioned directly in front of said end jamb bricks.

4. In a coke oven battery having vertically flued heating walls of refractory brick flanking the sides of each coking chamber, and buckstays bearing against the opposite sides of each heating wall, a jamb structure for the ends of each heating Wall, said jamb structure constituted of courses of brick with each course consisting of (1) two spaced end jamb bricks, the outer side of each of which defines a portion of a coking chamber opening, (2) a center jamb brick having an inner portion filling the space between said two spaced end jamb bricks and an outer portion defining a bearing surface for the buckstay positioned adjacent the end of said heating wall, said outer portion being spaced outwardly away from the outer ends of said end jamb bricks, and (3) a lateral end brick positioned contiguous to the inner ends of said two end jamb bricks and said inner portion of said center jamb brick, said lateral end brick defining a portion of the end wall of an end flue in said heating wall; the said bricks of alternate courses being individual to that course and of the same shape and dimensions and being of different dimensions from the bricks in adjacent courses whereby the joints between contiguous bricks in alternate courses are staggered relative to the joints between contiguous bricks in the intervening courses, the outer ends of said end jamb bricks and the outer portions of the center jamb bricks of all courses defining the end of said heating wall in vertical alignment along the height of said heating wall, the buckstays at the opposite ends of each heating wall being positioned directly opposite the outer portions of the center jamb bricks of all courses in said heating wall to apply compressive forces to said outer portions of said center jamb bricks, a door frame for each coking chamber opening positioned with the vertical surfaces thereof directly in front of the end jamb bricks forming the ends of the heating walls flanking said coking chamber, and clamping means extending from each buckstay to the vertical side of the door frame adjacent thereto to hold said door frame in place, said buckstay applying compressive forces to the end jamb bricks adjacent said buckstay through said clamping means and the portion of the door frame positioned directly in front of said end jamb bricks.

5. In a coke oven battery having refractory brick heating walls, each having vertical heating flues therein and each flanking the sides of a coking chamber, and buckstays bearing against the opposite ends of each heating Wall, a jamb structure for each end of each heating wall, said jamb structure consisting of (1) a first set of two spaced end jamb bricks of like size and shape positioned in alternate courses along the height of the end of the heating wall, and a second set of two spaced end jamb bricks in the intervening courses of the same size and shape but differing from the shape of the two end jamb bricks of said first set, each end jamb brick having an outer side defining a portion of a coking chamber opening, an inner side opposite to said outer side, an outer end defining a portion of the extreme end of the heating wall, and an inner end opposite to said outer end, each jamb brick of said first set having said outer end provided with opposing corner recesses and said inner end provided with a cutaway portion extending from said inner side along said inner end in a direction toward but terminating short of said outer side, each jamb brick of said second set having said outer end provided with a corner recess common to said outer end and said outer side and a second corner recess common to said outer end and said inner side and said inner end provided with a stepped configuration providing a corner recess common to said inner side and said inner end and a projection forming a corner common to said inner end and said outer side,

(2) a center jamb brick in each course with the center jamb brick of adjacent courses being differently shaped, each center jamb brick having an inner portion filling the space between the inner sides of said two spaced end jamb bricks and an outer portion defining a surface receiving compressive forces from the buckstay positioned adjacent the end of said heating wall, said outer portion being spaced outwardly away from the outer ends of said end jamb brick,

(3) a lateral end brick generally oblong in shape in each course, the lateral end brick in the alternate courses being of the same dimensions and seated in said cutaway portions, the lateral end bricks in the intervening courses being all of the same dimensions but dimensioned differently from the lateral end bricks in the alternate courses and seated in said corner recesses common to the inner side and inner end and each lateral end brick having a groove extending across the top end thereof in a direction parallel to the end of the heating wall and a tongue on the base thereof congruent with the groove in the top of the underlying brick, which tongue is seated in said groove in said underlying lateral end brick, the outer ends of said two end jamb bricks and the outer portions of the center jamb bricks of successive courses defining the end of said heating wall and being in vertical alignment, the buckstays at the opposite ends of each heating wall being positioned directly opposite the outer portions of the center jamb bricks of all courses in said heating wall to apply compressive forces to said outer portions of said center jamb bricks, a door frame for each coking chamber opening positioned with the vertical surfaces thereof directly in front of the end jamb bricks forming the ends of the heating walls flanking said coking chamber, and clamping means extending from each buckstay to the vertical side of the door frame adjacent thereto to hold said door frame in place, said buckstay applying compressive forces to the end jamb bricks adjacent said buckstay through said clamping means and the portion of the door frame positioned directly in front of said end jamb bricks.

6. In a coke oven battery as defined in claim 5, in which each heating wall has at the end thereof contiguous to the jamb structure, courses of stretcher bricks defining the sides of said heating wall with the ends of said stretcher bricks adjacent said jamb structure making a tight joint with the opposite ends of the lateral end brick in the same course and defining the outer end of the outer heating flue in said heating wall, the said two spaced end jamb bricks of each course being replaceable without removing the buckstay compressive forces exerted by the buckstays against the outer portions of the center jamb bricks of all courses in each heating wall and without disrupting the walls defining the outer heating flues.

References Cited by the Examiner UNITED STATES PATENTS 1,099,256 6/14 Koppers 202-248 1,430,207 9/22 Plantinga 202-267 1,878,680 9/ 32 Dunkle et al 202-248 2,091,703 8/37 Denig 202-268 XR 2,340,981 2/44 Otto 202222 2,393,658 1/46 Rueckel 202--267 3,102,846 9/63 Tucker 202139 FOREIGN PATENTS 281,403 12/27 Great Britain. 1,122,492 1/ 62 Germany.

MORRIS O. WOLK, Primary Examiner. 

1. IN A COKE OVEN BATTERY HAVING VERTICALLY FLUED HEATING WALLS OF REFRACTORY BRICK FLANKING THE SIDES OF THE COKING CHAMBERS AND BUCKSTAYS POSITIONED ADJACENT THE OPPOSITE ENDS OF THE HEATING WALLS AND EXERTING COMPRESSIVE FORCES AGAINST THE ENDS OF THE HEATING WALLS ON OPPOSITE SIDES OF THE BATTERY, A JAMB STRUCTURE FORMING THE END OF EACH HEATING WALL CONSTITUTED OF COURSES OF BRICK WITH EACH COURSE CONSISTING OF (1) TWO SPACED END JAMB BRICKS, THE OUTER SIDES OF EACH WHICH DEFINES A PORTION OF A COKING CHAMBER OPENING, (2) A CENTER JAMB BRICK HAVING AN INNER PORTION FILLING THE SPACE BETWEEN THE INNER SIDES OF SAID TWO SPACED END JAMB BRICKS AND AN OUTER PORTION DEFINING A SURFACE RECEIVING COMPRESSIVE FORCES FROM THE BUCKSTAY POSITIONED ADJACENT THE END OF SAID HEATING WALL, SAID OUTER PORTION BEING SPACED OUTWARDLY AWAY FROM THE OUTER ENDS OF SAID END JAMB BRICKS, AND (3) A LATERAL END BRICK POSITIONED CONTIGUOUS TO THE INNER ENDS OF SAID TWO END JAMB BRICKS AND SAID INNER PORTION OF SAID CENTER JAMB BRICK, EXTENDING THEREACROSS AND DEFINING A PORTION OF THE OUTER END WALL OF THE END FLUE IN SAID HEATING WALL, SAID HEATING WALL HAVING COURSES OF BRICK, WITH ONE COURSE FOR EACH COURSE OF BRICK IN SAID JAMB STRUCTURE, EACH OF THE HEATING WALL COURSES CONSISTING OF OPPOSITELY DISPOSED STRETCHER BRICKS, HEADER BRICKS AND FILLER BRICKS WITH ONE HEADER BRICK AND A FILLER BRICK AT THE OPPOSITE ENDS OF EACH PAIR OF STRETCHER BRICKS EXCEPT AT EACH OF THE ENDS OF THE HEATING WALL WHERE A LATERAL END BRICK, A PAIR OF OPPOSITELY DISPOSED STRETCHER BRICKS, A HEADER BRICK AND A FILLER BRICK DEFINE THE PORTIONS OF THE WALLS OF THE END FLUE FORMED BY SAID COURSE, THE SAID BRICKS DEFINING THE JAMB OF ALTERNATE COURSES BEING OF THE SAME SHAPE AND DIMENSIONS AND BEING DIFFERENTLY DIMENSIONED FROM THE CORRESPONDING BRICKS IN ADJACENT COURSES WHEREBY THE JOINTS BETWEEN CONTIGUOUS BRICKS IN ONE COURSE ARE STAGGERED RELATIVE TO THE CORRESPONDING JOINTS BETWEEN CONTIGUOUS BRICKS IN ADJACENT COURSES, THE BUCKSTAYS AT THE OPPOSITE ENDS OF EACH HEATING WALL BEING POSITIONED DIRECTLY OPPOSITE THE OUTER PORTIONS OF THE CENTER JAMB BRICKS OF ALL COURSES IN SAID HEATING WALL TO APPLY COMPRESSIVE FORCES TO SAID OUTER PORTIONS OF SAID CENTER JAMB BRICKS, A DOOR FRAME FOR EACH COKING CHAMBER OPENING POSITIONED WITH THE VERTICAL SURFACES THEREOF DIRECTLY IN FRONT OF THE END JAMB BRICKS FORMING THE ENDS OF THE HEATING WALLS FLANKING SAID COKING CHAMBER, CLAMPING MEANS EXTENDING FROM EACH BUCKSTAY TO THE VERTICAL SIDE OF THE DOOR FRAME ADJACENT THERETO TO HOLD SAID DOOR FRAME IN PLACE, SAID BUCKSTAY APPLYING COMPRESSIVE FORCES TO THE END JAMB BRICK ADJACENT SAID BUCKSTAY THROUGH SAID CLAMPING MEANS AND THE PORTION OF THE DOOR FRAME POSITIONED DIRECTLY IN FRONT OF SAID END JAMB BRICKS. 